Then they're pretty much wrong, unless they're backed up by a review or direct source... considering that the Chaser wasn't sold in any MPH-using markets. Most I can find is that factory claims low 6's, while independent testing shows some stock units just under 6 to 100. Which, again, is in the mid-5s to 60 mph... which , again, is pretty good for a barge.
I see a LOT of websites claiming 0-60 mph times transposed directly from 0-100 km/h times. Rule of thumb is: If it's not sourced directly from US magazine tests, it's not a 0-60 time. (and if it's sourced from Car and Driver, it's going to be faster still due to roll-out and SAE corrections they apply). I've done a crapload of V-Box runs, and the difference, trust me, is half-a-second to a second long. Even with an automatic.
Still: